I am the opposite.
I have a 128GB 6+, and felt guilty, spending so much money. I mean I normally go for the $399, but it was only $100 more. so I did it, and realized, crap I spent $500.
I went through my phone, deleted all the apps I don't use and could care less about. Low and behold I was below 32GB, or right around there.
So I went for 64GB this time.
I used to have my phone packed so full I kept getting the out of storage space warnings. Then I realized I really don't need EVERY picture on my phone. Hey, they're in my photo stream/on my computer. I did really want the 128, but didn't feel like I should spend that extra money if I didn't need to.